Hackers Guide to Visual FoxPro 7.0

2017-07-07 02:10:07

Abs(), Sign()

These two functions let you take the sign off a number.

Usage

nAbsoluteValue = ABS( nValue ) nSign = SIGN( nValue )

ABS() returns the absolute value of the number, that is, the number without the sign. SIGN() does the reverse and returns the sign without the number—it uses 1, 0 and -1 to represent positive, zero and negative signs, respectively. ABS() and SIGN() work on all four number types: currency, double, integer and numeric.

Example

? ABS(37) && returns 37 ? ABS(-37) && returns 37 ? SIGN(37) && returns 1 ? SIGN(-37) && returns -1 ? SIGN(0) && returns 0

ABS() and SIGN() both handle null values, returning .NULL.

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